2001 PITTSBURGH, GRTR. PITT. AIRPORT PENNSYLVANIA (PIT)



Pittsburgh lies at the foothills of the Allegheny Mountains at the confluence of the Allegheny and Monongahela Rivers which form the Ohio. The city is a little over 100 miles southeast of Lake Erie. It has a humid continental type of climate modified only slightly by its nearness to the Atlantic Seaboard and the Great Lakes.

The predominant winter air masses influencing the climate of Pittsburgh have a polar continental source in Canada and move in from the Hudson Bay region or the Canadian Rockies. During the summer, frequent invasions of air from the Gulf of Mexico bring warm humid weather. Occasionally, Gulf air reaches as far north as Pittsburgh during the winter and produces intermittent periods of thawing. The last spring temperature of 32 degrees usually occurs in late April and the first in late October. The average growing season is about 180 days. There is a wide variation in the time of the first and last frosts over a radius of 25 miles from the center of Pittsburgh due to terrain differences.

Precipitation is distributed well throughout the year. During the winter months about a fourth of the precipitation occurs as snow and there is about a 50 percent chance of measurable precipitation on any day. Thunderstorms occur normally during all months, except midwinter, and have a maximum frequency in midsummer. The first appreciable snowfall generally occurs in late November and usually the last occurs early in April. Snow lies on the ground in the suburbs on an average of about 33 days during the year.

Seven months of the year, April through October, have sunshine more than 50 percent of the possible time. During the remaining five months cloudiness is heavier because the track of migratory storms from west to east is closer to the area and because of the frequent periods of cloudy, showery weather associated with northwest winds from across the Great Lakes. Cold air drainage induced by the many hills leads to the frequent formation of early morning fog which may be quite persistent in the river valleys during the colder months.

The Allegheny River flowing south and the Monongahela River flowing north meet to form the Ohio River at Pittsburgh. Heavier rainfall and steeper topography cause the Monongahela River to flood more frequently than the Allegheny River.

Both rivers combine to cause the Ohio River at Pittsburgh to reach the 25 foot flood stage approximately once every four years. The serious flood level of 30 feet is reached much less frequently.

NORMALS, MEANS, AND EXTREMES

PITTSBURGH, PA (PIT)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 94823

40 30′ 05″ N  80 13′ 52″ W  GRND:  1172  BARO: &#x 0A0;1175  EASTERN (UTC + 5)

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 33.7 36.9 49.0 60.3 70.6 78.9 82.6 80.8 74.3 62.5 50.4 38.6 59.9
MEAN DAILY MAXIMUM 54 35.5 38.7 48.2 60.8 70.9 79.3 82.8 81.2 74.4 63.1 50.5 39.2 60.4
HIGHEST DAILY MAXIMUM 49 69 76 82 89 91 98 103 100 97 87 82 74 103
YEAR OF OCCURRENCE 1999 2000 1998 1990 1987 1988 1988 1988 1954 1959 1961 1982 JUL 1988
MEAN OF EXTREME MAXS. 54 58.3 61.2 73.4 80.8 85.6 90.3 91.9 90.3 87.7 79.2 71.2 60.9 77.6
NORMAL DAILY MINIMUM 30 18.5 20.3 29.8 38.8 48.4 56.9 61.6 60.2 53.5 42.3 34.1 24.4 40.7
MEAN DAILY MINIMUM 54 20.3 22.3 29.6 39.6 49.1 57.8 62.2 60.9 53.7 42.9 34.2 25.0 41.5
LOWEST DAILY MINIMUM 49 -22 -12 -1 14 26 34 42 39 31 16 -1 -12 -22
YEAR OF OCCURRENCE 1994 1979 1980 1982 1970 1972 1963 1982 1959 1965 1958 1989 JAN 1994
MEAN OF EXTREME MINS. 54 -.6 1.7 11.2 23.0 34.3 43.7 50.2 48.6 38.0 28.1 17.3 6.1 25.1
NORMAL DRY BULB 30 26.1 28.7 39.4 49.6 59.5 67.9 72.1 70.5 63.9 52.4 42.3 31.5 50.3
MEAN DRY BULB 54 27.8 30.6 38.9 50.2 60.0 68.6 72.5 71.0 64.2 53.0 42.2 32.0 50.9
MEAN WET BULB 18 26.5 29.1 34.9 44.4 53.7 62.1 65.8 64.6 58.2 47.6 38.6 30.2 46.3
MEAN DEW POINT 18 21.0 22.7 27.6 36.6 47.7 57.3 61.5 60.4 54.0 42.2 32.9 24.8 40.7
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.0 0.3 1.6 3.4 1.7 0.6 0.0 0.0 0.0 7.6
MAXIMUM 32 30 14.5 10.3 3.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.3 9.9 39.2
MINIMUM 32 30 27.3 23.9 19.5 8.4 0.9 0.0 0.0 0.0 0.0 4.3 14.1 24.5 122.9
MINIMUM 0 30 2.6 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 * 0.8 5.0
H/C NORMAL HEATING DEG. DAYS 30 1206 1016 794 462 214 36 6 14 100 400 681 1039 5968
NORMAL COOLING DEG. DAYS 30 0 0 0 0 44 123 227 184 67 9 0 0 654
RH NORMAL (PERCENT) 30 70 67 64 60 63 66 69 71 72 68 70 72 68
HOUR 01 LST 30 72 71 69 66 72 77 80 82 82 77 74 75 75
HOUR 07 LST 30 75 74 74 72 76 79 82 86 86 81 78 77 78
HOUR 13 LST 30 65 62 57 50 52 52 54 56 57 55 62 67 57
HOUR 19 LST 30 67 63 58 52 55 57 60 63 66 63 67 70 62
S PERCENT POSSIBLE SUNSHINE 49 32 36 43 46 50 55 57 55 55 51 36 29 45
W/O MEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI) 50 1.4 1.2 1.0 0.8 1.3 1.1 1.6 2.1 2.3 1.8 1.4 1.8 17.8
THUNDERSTORMS 50 0.2 0.5 1.7 3.4 5.1 6.9 6.6 5.4 3.0 1.2 0.6 0.3 34.9
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 44 6.5 6.2 6.0 5.8 5.5 5.2 4.9 4.9 4.8 4.9 6.0 6.4 5.6
MIDNIGHT-MIDNIGHT (OKTAS) 32 6.3 5.9 5.7 5.4 5.1 4.9 4.6 4.4 4.5 4.6 5.8 6.2 5.3
MEAN NO. DAYS WITH:
CLEAR 44 2.9 3.3 4.5 4.4 5.3 4.8 5.4 6.6 7.3 7.8 3.7 2.7 58.7
PARTLY CLOUDY 44 6.0 5.9 6.8 8.3 9.0 11.8 12.8 11.6 10.1 8.8 6.3 5.7 103.1
CLOUDY 44 22.2 19.1 19.8 17.3 16.7 13.4 12.7 12.9 12.5 14.4 20.0 22.6 203.6
PR MEAN STATION PRESSURE(IN) 28 28.74 28.75 28.70 28.68 28.69 28.71 28.74 28.75 28.80 28.79 28.77 28.76 28.74
MEAN SEA-LEVEL PRES. (IN) 18 30.09 30.09 30.05 29.97 29.99 29.99 30.02 30.06 30.08 30.12 30.11 30.12 30.06
WINDS MEAN SPEED (MPH) 44 10.5 10.3 10.8 10.5 8.8 8.0 7.4 7.0 7.6 8.3 9.6 10.0 9.1
PREVAIL. DIR (TENS OF DEGS) 33 26 27 27 27 23 23 24 23 23 26 26 26 26
MAXIMUM 2-MINUTE:
SPEED (MPH) 5 41 38 38 51 40 53 45 46 38 39 36 37 53
DIR. (TENS OF DEGS) 27 20 30 30 31 34 29 33 20 31 32 26 34
YEAR OF OCCURRENCE 1999 2001 1999 1998 2000 1998 2001 2001 1999 1999 2001 2000 JUN 1998
MAXIMUM 5-SECOND:
SPEED (MPH) 5 48 55 45 61 59 62 61 60 47 47 47 52 62
DIR. (TENS OF DEGS) 27 26 28 31 22 34 33 34 21 31 31 23 34
YEAR OF OCCURRENCE 1999 2001 1997 1998 1997 1998 1997 2001 1999 1999 2001 2000 JUN 1998
PRECIPITATION NORMAL (IN) 30 2.54 2.39 3.41 3.15 3.59 3.71 3.75 3.21 2.97 2.36 2.85 2.92 36.85
MAXIMUM MONTHLY (IN) 49 6.25 5.98 6.10 7.61 6.56 10.29 8.71 7.86 6.00 8.20 11.05 8.51 11.05
YEAR OF OCCURRENCE 1978 1956 1967 1964 1989 1989 1992 1987 1990 1954 1985 1990 NOV 1985
MINIMUM MONTHLY (IN) 49 0.77 0.51 1.14 0.48 1.21 0.64 1.62 0.78 0.28 0.16 0.90 0.40 0.16
YEAR OF OCCURRENCE 1981 1969 1969 1971 1965 1992 1989 1957 1985 1963 1976 1955 OCT 1963
MAXIMUM IN 24 HOURS (IN) 49 1.69 2.30 2.00 2.15 2.90 3.11 4.41 3.06 2.59 3.56 1.97 2.76 4.41
YEAR OF OCCURRENCE 1986 1975 1964 1964 1997 1996 1999 1956 1990 1954 1985 1990 JUL 1999
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 16.4 14.0 15.4 13.6 12.9 11.8 10.4 9.5 10.0 10.5 13.3 16.7 154.5
PRECIPITATION 1.00 30 0.3 0.3 0.3 0.4 0.7 0.8 0.9 0.9 0.5 0.2 0.3 0.3 5.9
SNOWFALL NORMAL (IN) 30 12.6 9.9 7.7 1.7 0.2 0.0 0.0 0.0 0.0 0.2 3.2 8.1 43.6
MAXIMUM MONTHLY (IN) 48 40.2 24.2 34.1 8.1 3.1 T T T T 8.5 13.9 21.2 40.2
YEAR OF OCCURRENCE 1978 1972 1993 1987 1966 1990 1991 1994 1989 1993 1995 1974 JAN 1978
MAXIMUM IN 24 HOURS (IN) 48 14.0 12.3 23.8 7.7 3.1 T T T T 6.6 10.5 12.5 23.8
YEAR OF OCCURRENCE 1966 1960 1993 1987 1966 1990 1991 1994 1989 1993 1958 1974 MAR 1993
MAXIMUM SNOW DEPTH (IN) 53 26 16 25 7 1 0 0 0 0 1 22 13 26
YEAR OF OCCURRENCE 1978 1961 1993 1987 1963 1992 1950 1974 JAN 1978
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 3.9 3.1 2.3 0.5 0.1 0.0 0.0 0.0 0.0 0.1 0.9 2.5 13.4

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

PRECIPITATION (inches) 2001 PITTSBURGH, GRTR. PITT. AIRPORT PA (PIT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 1.84 3.64 3.68 4.37 1.38 5.08 2.98 1.79 5.42 2.15 4.70 3.04 40.07
1973 2.03 1.80 3.86 4.69 5.87 3.12 2.16 3.40 3.56 4.45 2.65 2.15 39.74
1974 3.47 2.10 3.72 3.26 5.35 5.08 3.30 2.93 4.42 1.12 3.06 4.02 41.83
1975 3.34 4.64 4.62 2.27 1.84 4.58 4.38 7.56 5.06 3.46 1.77 2.90 46.42
1976 3.25 1.74 4.45 1.24 1.99 3.37 4.72 1.25 3.30 3.76 0.90 1.81 31.78
1977 2.06 0.87 4.12 3.26 2.57 2.85 3.38 2.66 3.13 2.44 2.59 3.27 33.20
1978 6.25 0.54 1.65 2.25 4.26 4.11 2.15 3.65 2.64 3.42 1.62 5.24 37.78
1979 4.80 3.12 1.32 3.17 4.49 1.73 4.31 6.84 3.60 2.46 2.43 2.29 40.56
1980 1.56 1.32 5.65 2.94 4.32 4.34 6.76 5.10 1.29 2.42 2.38 1.38 39.46
1981 0.77 4.20 2.12 4.92 2.04 8.20 3.82 0.98 4.13 1.82 1.50 3.00 37.50
1982 4.44 1.93 3.52 1.44 3.98 3.05 2.36 1.97 2.80 0.40 3.33 2.79 32.01
1983 1.19 1.58 3.50 4.33 5.24 4.82 3.32 3.13 2.42 3.67 3.94 4.27 41.41
1984 1.40 2.05 2.32 3.72 5.22 1.98 3.01 5.15 0.84 3.45 3.14 3.04 35.32
1985 1.43 1.45 3.37 1.64 5.80 2.26 4.06 2.64 0.28 2.27 11.05 2.26 38.51
1986 2.49 3.43 1.38 1.94 1.67 5.24 5.66 3.04 2.33 2.83 3.92 3.47 37.40
1987 2.23 0.71 2.65 5.30 2.41 6.30 2.42 7.86 3.97 0.92 2.02 2.41 39.20
1988 1.49 3.46 2.56 1.97 2.78 1.26 2.82 2.04 2.34 1.40 2.80 2.17 27.09
1989 1.99 3.42 5.52 1.43 6.56 10.29 1.62 1.12 4.57 2.04 1.56 2.39 42.51
1990 3.30 3.31 1.47 3.48 6.19 4.24 6.59 3.59 6.00 3.51 2.05 8.51 52.24
1991 2.55 1.88 2.92 2.56 3.29 3.82 3.74 1.63 3.45 0.55 1.97 3.66 32.02
1992 2.13 1.73 3.54 2.30 2.31 0.64 8.71 4.77 2.91 1.47 3.31 2.83 36.65
1993 2.99 2.92 4.14 3.66 2.85 3.35 2.85 2.44 3.87 2.77 4.30 2.12 38.26
1994 3.90 2.13 5.00 3.72 2.54 2.91 3.27 7.75 3.59 0.88 3.64 2.01 41.34
1995 2.23 1.73 1.56 1.70 3.72 3.74 3.06 1.75 1.80 3.24 2.74 1.62 28.89
1996 3.68 2.54 4.54 4.42 2.95 7.95 4.01 1.99 5.63 2.96 2.83 1.98 45.48
1997 1.58 1.15 3.22 1.57 6.33 3.95 1.82 3.80 2.90 0.95 5.98 1.29 34.54
1998 3.63 2.57 1.91 5.00 2.39 6.71 2.02 3.32 1.09 2.27 1.50 1.81 34.22
1999 4.88 2.43 1.24 4.19 4.12 1.67 6.25 2.21 1.97 1.55 3.46 2.24 36.21
2000 1.70 2.53 2.26 3.15 5.69 5.64 6.28 3.66 3.07 2.09 1.38 2.64 40.09
2001 1.35 1.09 3.28 3.75 2.11 3.43 3.15 7.12 2.23 2.33 3.47 2.43 35.74
POR= 130 YRS 2.86 2.45 3.26 3.12 3.41 3.79 3.91 3.23 2.62 2.38 2.44 2.67 36.14

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

AVERAGE TEMPERATURE (F) 2001 PITTSBURGH, GRTR. PITT. AIRPORT PA (PIT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 29.6 26.5 36.4 48.5 61.8 63.8 71.2 70.6 65.3 48.4 39.3 37.2 49.9
1973 29.7 28.8 48.3 49.3 56.4 70.9 73.2 73.2 66.5 56.1 44.1 33.3 52.5
1974 34.0 29.9 41.2 51.8 58.3 65.2 73.1 72.8 62.2 52.4 43.9 32.5 51.4
1975 32.6 32.1 36.3 44.3 63.0 67.8 72.8 73.0 58.8 53.3 46.3 32.9 51.1
1976 23.5 37.2 45.2 50.6 55.6 68.4 67.4 65.3 59.9 45.9 33.1 23.9 48.0
1977 11.4 26.9 43.7 50.8 63.0 63.8 71.8 68.1 64.7 50.5 45.6 31.1 49.3
1978 22.6 20.9 36.9 51.0 60.2 69.4 73.0 71.4 66.2 49.1 43.0 32.7 49.7
1979 21.4 18.0 43.1 49.7 59.1 67.7 70.3 69.6 63.4 50.9 44.7 34.6 49.4
1980 26.9 24.2 35.6 48.1 60.3 66.2 75.0 74.5 67.1 49.5 38.6 28.6 49.6
1981 20.5 31.4 35.6 51.9 58.4 68.8 72.1 69.7 61.9 49.4 40.3 29.4 49.1
1982 20.9 28.4 38.4 45.3 64.7 63.7 72.4 68.2 63.4 54.4 44.7 39.9 50.4
1983 30.0 32.6 40.7 47.1 55.8 67.8 73.0 72.8 64.4 53.0 43.5 25.4 50.5
1984 23.2 36.4 32.2 49.2 55.3 69.7 68.5 70.8 61.4 58.3 40.2 39.3 50.4
1985 22.1 27.7 42.1 55.0 60.6 64.2 70.5 69.6 65.3 55.2 47.1 27.4 50.6
1986 28.3 31.3 41.1 53.1 62.0 68.3 73.3 68.6 66.6 54.2 40.4 33.1 51.7
1987 28.0 32.6 41.9 50.0 63.0 70.9 75.7 71.8 65.1 47.8 46.2 35.1 52.3
1988 26.6 29.0 39.3 49.4 61.4 68.5 76.9 75.1 63.5 46.6 44.2 31.9 51.0
1989 35.5 27.8 41.1 47.0 58.0 69.0 74.1 71.6 64.8 53.3 40.6 19.2 50.2
1990 36.8 36.9 44.0 51.3 57.7 68.3 71.7 70.5 63.7 55.0 45.5 38.0 53.3
1991 29.7 35.4 43.0 54.5 68.7 72.6 75.4 74.4 64.6 55.7 41.6 35.3 54.2
1992 30.5 34.3 38.8 51.3 59.1 66.0 72.4 67.9 63.7 50.1 42.9 33.9 50.9
1993 35.1 27.8 37.6 50.0 61.9 68.9 75.7 75.4 63.3 51.7 43.0 31.7 51.8
1994 21.1 29.5 37.8 53.9 56.7 72.9 74.5 70.0 63.8 53.4 47.7 38.2 51.6
1995 31.0 26.5 42.8 48.6 60.4 72.0 75.8 77.8 64.3 56.3 38.1 27.7 51.8
1996 27.5 30.1 34.7 50.7 60.0 72.3 69.6 70.6 63.7 52.0 36.3 36.5 50.3
1997 28.1 35.1 40.5 46.4 54.3 68.1 71.7 68.2 62.1 52.6 39.0 33.5 50.0
1998 37.1 38.5 42.4 51.0 64.4 67.1 71.2 73.1 67.2 53.1 44.4 37.8 53.9
1999 30.1 34.0 35.1 51.8 61.0 69.4 76.0 69.0 64.2 52.3 46.7 34.6 52.0
2000 27.7 36.0 44.9 50.2 62.5 69.7 68.8 69.1 62.3 54.7 39.5 23.1 50.7
2001 28.4 35.1 35.3 54.3 60.0 68.4 70.2 73.1 62.1 54.2 48.2 37.5 52.2
POR= 126 YRS 30.0 31.2 39.9 50.9 61.6 70.2 74.2 72.5 66.2 54.7 43.0 33.2 52.3

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

HEATING DEGREE DAYS (base 65 F) 2001 PITTSBURGH, GRTR. PITT. AIRPORT PA (PIT)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 20 11 63 508 767 853 1087 1006 508 474 264 2 5563
1973-74 2 8 55 274 621 978 957 978 729 403 223 54 5282
1974-75 0 0 124 384 630 1001 997 916 881 617 116 48 5714
1975-76 0 0 192 362 554 989 1278 801 605 453 301 24 5559
1976-77 15 59 159 587 953 1268 1655 1060 658 436 138 102 7090
1977-78 11 41 78 442 583 1043 1307 1229 860 412 209 38 6253
1978-79 4 3 80 485 656 993 1346 1311 671 458 219 38 6264
1979-80 23 26 111 438 601 935 1175 1177 906 500 172 71 6135
1980-81 0 5 48 476 787 1117 1372 936 904 391 223 18 6277
1981-82 3 10 159 475 736 1098 1361 1017 819 586 82 67 6413
1982-83 9 23 119 336 605 770 1080 904 746 535 280 44 5451
1983-84 10 2 126 365 639 1223 1293 823 1008 471 305 16 6281
1984-85 12 7 165 214 734 790 1322 1038 701 334 163 65 5545
1985-86 3 9 116 300 531 1160 1131 936 737 368 148 37 5476
1986-87 1 40 65 346 733 983 1139 904 710 451 145 22 5539
1987-88 4 20 61 529 560 920 1181 1040 792 461 149 64 5781
1988-89 5 3 83 570 619 1018 905 1033 739 532 260 25 5792
1989-90 1 14 102 364 723 1414 869 781 657 439 229 49 5642
1990-91 4 1 116 314 577 829 1085 820 674 337 63 5 4825
1991-92 0 0 127 308 698 913 1063 880 805 417 210 50 5471
1992-93 1 17 116 457 657 956 920 1037 841 445 135 43 5625
1993-94 0 0 118 407 654 1028 1357 988 836 345 278 21 6032
1994-95 0 10 80 351 516 824 1047 1071 678 487 163 5 5232
1995-96 0 0 79 269 799 1150 1155 1005 930 436 215 5 6043
1996-97 14 1 104 397 853 873 1136 832 755 554 329 35 5883
1997-98 2 21 109 401 772 973 858 736 716 415 78 75 5156
1998-99 0 0 52 369 616 837 1076 861 917 387 140 40 5295
1999-00 1 6 101 386 541 935 1148 833 620 442 135 33 5181
2000-01 8 14 158 317 761 1291 1123 833 912 350 171 43 5981
2001- 17 2 125 341 497 846

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

COOLING DEGREE DAYS (base 65 F) 2001 PITTSBURGH, GRTR. PITT. AIRPORT PA (PIT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 34 68 219 192 76 0 0 0 589
1973 0 0 0 10 5 185 264 269 108 5 0 0 846
1974 0 0 0 13 19 66 258 247 45 5 4 0 657
1975 0 0 0 0 60 137 248 257 12 7 0 0 721
1976 0 0 1 25 14 134 99 73 12 0 0 0 358
1977 0 0 3 14 83 75 231 141 72 0 4 0 623
1978 0 0 0 0 69 178 260 207 122 0 0 0 836
1979 0 0 0 9 41 125 193 175 70 7 0 0 620
1980 0 0 0 0 34 115 317 306 118 0 0 0 890
1981 0 0 0 5 25 139 230 160 72 0 0 0 631
1982 0 0 0 0 79 33 246 127 77 15 3 0 580
1983 0 0 0 3 3 135 263 251 115 0 0 0 770
1984 0 0 0 3 12 165 127 194 63 13 0 0 577
1985 0 0 0 41 33 49 181 160 130 4 0 0 598
1986 0 0 3 20 65 144 265 157 121 20 0 0 795
1987 0 0 0 6 93 204 342 240 72 0 1 0 958
1988 0 0 0 0 44 174 381 322 47 7 0 0 975
1989 0 0 5 0 49 154 291 225 100 9 0 0 833
1990 0 0 14 37 9 153 218 179 83 13 0 0 706
1991 0 0 0 27 184 239 333 298 124 27 0 0 1232
1992 0 0 0 9 33 87 233 112 86 3 0 0 563
1993 0 0 0 2 45 166 337 327 73 1 1 0 952
1994 0 0 0 21 28 264 302 175 51 0 2 0 843
1995 0 0 0 0 27 220 342 402 65 7 0 0 1063
1996 0 0 0 11 67 230 162 186 71 0 0 0 727
1997 0 0 0 2 4 134 217 128 29 24 0 0 538
1998 0 0 22 0 67 147 199 254 125 6 0 0 820
1999 0 0 0 0 24 178 350 136 83 0 0 0 771
2000 0 0 5 2 67 181 131 147 83 6 0 0 622
2001 0 0 0 34 20 152 184 258 44 12 0 0 704

2001 Pittsburgh, Grtr. Pitt. Airport Pennsylvania (PIT)

SNOWFALL (inches) 2001 PITTSBURGH, GRTR. PITT. AIRPORT PA (PIT)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 1.8 6.1 2.9 3.4 6.1 4.6 1.4 T 0.0 26.3
1973-74 0.0 0.0 0.0 0.0 0.8 4.8 4.9 2.2 2.3 1.6 T 0.0 16.6
1974-75 0.0 0.0 0.0 T 2.6 21.2 10.1 13.9 9.8 1.1 0.0 0.0 58.7
1975-76 0.0 0.0 0.0 0.0 1.9 3.8 21.8 3.3 4.3 0.5 0.0 0.0 35.6
1976-77 0.0 0.0 0.0 T 6.6 7.9 26.5 6.4 0.9 1.3 T 0.0 49.6
1977-78 0.0 0.0 0.0 T 3.3 9.1 40.2 5.4 4.0 0.2 0.0 0.0 62.2
1978-79 0.0 0.0 0.0 0.0 2.3 3.2 18.2 13.7 2.0 1.4 0.0 0.0 40.8
1979-80 0.0 0.0 0.0 T 1.1 1.1 7.8 6.2 7.9 T 0.0 0.0 24.1
1980-81 0.0 0.0 0.0 T 9.7 6.3 12.5 11.9 7.6 T 0.0 0.0 48.0
1981-82 0.0 0.0 0.0 T 0.6 11.5 13.4 3.6 12.2 3.8 0.0 0.0 45.1
1982-83 0.0 0.0 0.0 T 0.1 8.8 3.9 12.0 4.3 1.0 0.0 0.0 30.1
1983-84 0.0 0.0 0.0 0.0 6.1 10.5 10.8 11.4 10.4 T 0.0 0.0 49.2
1984-85 0.0 0.0 0.0 0.0 1.5 4.8 14.6 8.1 0.2 7.2 0.0 0.0 36.4
1985-86 0.0 0.0 0.0 0.0 T 15.3 11.1 12.4 4.8 2.7 0.0 0.0 46.3
1986-87 0.0 0.0 0.0 0.0 1.0 0.9 11.6 1.1 7.3 8.1 0.0 0.0 30.0
1987-88 0.0 0.0 0.0 T 4.1 7.9 5.5 6.9 9.8 0.9 0.0 0.0 35.1
1988-89 0.0 0.0 0.0 0.2 1.1 4.0 4.2 4.1 7.5 0.6 T 0.0 21.7
1989-90 0.0 0.0 T 0.2 1.6 12.5 7.7 2.5 0.6 3.3 0.0 T 28.4
1990-91 0.0 0.0 0.0 0.0 T 4.6 4.8 3.6 4.2 T 0.0 0.0 17.2
1991-92 T 0.0 0.0 0.0 2.1 3.1 12.9 2.4 10.6 2.8 T 0.0 33.9
1992-93 0.0 0.0 0.0 1.3 1.5 14.1 2.1 18.5 34.1 0.5 0.0 0.0 72.1
1993-94 0.0 0.0 0.0 8.5 2.6 10.4 30.1 11.0 13.6 0.6 0.0 0.0 76.8
1994-95 0.0 T 0.0 0.0 0.2 T 7.6 9.0 6.4 0.2 0.0 0.0 23.4
1995-96 0.0 0.0 0.0 0.0 13.9 12.6 23.4 9.6 13.4 1.6 0.0 0.0 74.5
1996-97 0.0 0.0 0.0 0.0 4.4 6.1 0.0 0.0
1997-98 0.0 0.0 0.0 0.0 12.6 1.7 2.5 4.9 0.0 0.0 0.0
1998-99 0.0 0.0 0.0 T T 1.8 17.1 4.7 15.6 T 0.0 0.0 39.2
1999-00 0.0 0.0 0.0 T 2.1 3.2 12.0 8.4 1.1 0.3 T 0.0 27.1
2000-01 0.0 0.0 0.0 T 2.1 8.3 13.7 2.7 8.0 1.1 0.0 0.0 35.9
2001-T 0.0 0.0 0.2 T 5.0
POR= 48 YRS T T T 0.4 3.3 8.0 11.5 8.8 8.5 1.6 0.2 T 42.3



User Contributions:

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Oct 20, 2011 @ 2:14 pm
What was the average snowfall in pittsburg, pennsilvania during 2001?
Esra
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Feb 27, 2012 @ 10:22 pm
I told my kids we'd play after I found what I ndeeed. Damnit.

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